Effect of omega phase on selected properties of beta III titanium alloy. Final report, Feb 1971--Nov 1974
Technical Report
·
OSTI ID:7246550
The program objective is to increase the elastic modulus, or modulus-density ratio, of heat treatable beta titanium alloys, while maintaining adequate levels of strength, ductility and toughness by suitable thermomechanical processing and thermal treatments. Material from production and laboratory heats, centering on the Beta III alloy (Ti-11.5Mo-6Zr-4.5Sn), was evaluated by correlating microstructural features with mechanical properties for material subjected to various thermal-mechanical process sequences and thermal treatments. The results show that the elastic modulus can be increased by (1) an increase in the proportion of the high modulus alpha phase, (2) judicious increase in the amount of omega, and (3) an increase in the molybdenum content of the beta phase. Transformation kinetics within the omega formation temperature range and the nature of the omega to alpha transformation are discussed. (GRA)
- Research Organization:
- Colt Industries, Inc., Pittsburgh, Pa. (USA). Crucible Materials Research Center
- OSTI ID:
- 7246550
- Report Number(s):
- AD-A-012701
- Country of Publication:
- United States
- Language:
- English
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